You seem passionate but naive or not entirely informed. I don't mean that derogatorily.

Every kid has a smart phone. Those record their conversations 24/7, store all visual data even when the camera is not in use, track their every movement, sell it to 3rd parties or even foreign governments in the case of TikTok, and build / maintain a profile specifically to target them psychologically to nudge them into the client's desired action.

Many schools already have cameras in certain areas to dissuade crime and theft. This is just an extension into the classroom where the danger is mental (and sometimes physical) abuse.